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Titolo:
Synthesis and design of superhard materials
Autore:
Haines, J; Leger, JM; Bocquillon, G;
Indirizzi:
CNRS, Lab Phys Chim Mat, F-92190 Meudon, France CNRS Meudon France F-92190 RS, Lab Phys Chim Mat, F-92190 Meudon, France
Titolo Testata:
ANNUAL REVIEW OF MATERIALS RESEARCH
, volume: 31, anno: 2001,
pagine: 1 - 23
SICI:
1531-7331(2001)31:<1:SADOSM>2.0.ZU;2-X
Fonte:
ISI
Lingua:
ENG
Soggetto:
CUBIC BORON-NITRIDE; HIGH-PRESSURE SYNTHESIS; CARBON NITRIDE; THIN-FILMS; MECHANICAL-PROPERTIES; PHASE-TRANSFORMATION; ELASTIC PROPERTIES; RUTHENIUM DIOXIDE; CRYSTAL-CHEMISTRY; METAL DIOXIDES;
Keywords:
diamond; cubic boron nitride; carbon nitride; high pressure; stishovite;
Tipo documento:
Review
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
71
Recensione:
Indirizzi per estratti:
Indirizzo: Haines, J CNRS, Lab Phys Chim Mat, 1 Pl Aristide Briand, F-92190 Meudon, France CNRS 1 Pl Aristide Briand Meudon France F-92190 Meudon, France
Citazione:
J. Haines et al., "Synthesis and design of superhard materials", ANN REV M R, 31, 2001, pp. 1-23

Abstract

The synthesis of the two currently used superhard materials, diamond and cubic boron nitride, is briefly described with indications of the factors influencing the quality of the crystals obtained. The physics of hardness is discussed and the importance of covalent bonding and fixed atomic positionsin the crystal structure, which determine high hardness values, is outlined. The materials investigated to date are described and new potentially superhard materials are presented. No material that is thermodynamically stable under ambient conditions and composed of light (small) atoms will have a hardness greater than that of diamond. Materials with hardness values similar to that of cubic boron nitride (cBN) can be obtained. However, increasing the capabilities of the high-pressure devices could lead to the production of better quality cBN compacts without binders.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/07/20 alle ore 05:25:54